Lodash v4 had been released (by the time this episode happens). This JavaScript library of utilities is one of the most widely used utility belts of the enormous JavaScript ecosystem. We're going to talk with John, the mastermind behind this utility (and fork of underscore) about his experience building such a ubiquitous tool and what it can do for you.We also delve into how to contribute to open source projects and how to manage them to encourage contribution. Tons of wisdom in this one!